Strong coupling for a single quantum dot in a microdisk

We report the observation of the strong coupling regime between a single GaAs quantum dot exciton and a microdisk optical mode. Microphotoluminescence is performed at various temperatures between 4 K and 50 K to tune the exciton through the cavity mode. An anticrossing is observed at 30 K with a Vacuum Rabi splitting of 400 ¹eV, twice as large as the individual linewidths. (© 2005 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim)